Merge branch 'step-up-interview' into 'main'

Step up interview

See merge request mthesis-edeboone/m.internship-documentation!1

presentations/2023-03-13_step_up_interview/2023-STEP_UP.tex

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+\documentclass[showdate=false]{beamer}
+
+
+%%%%%%%%
+% Goal: show enthousiasm, knowledge and drive about the field
+
+\usepackage[british]{babel}
+\usepackage{amsmath}
+\usepackage{hyperref}
+\usepackage[backend=bibtex,style=trad-plain]{biblatex}
+\usepackage{appendixnumberbeamer}
+\usepackage{graphicx}
+\graphicspath{{.}{./figures/}{../../figures/}}
+\usepackage{todo}
+
+\addbibresource{../../../bibliotheca/bibliography.bib}
+
+% Disable Captions
+\setbeamertemplate{caption}{\raggedright\small\insertcaption\par}
+
+% no to navigation, yes to frame numbering
+\beamertemplatenavigationsymbolsempty
+\setbeamerfont{page number in head/foot}{size=\normalsize}
+\setbeamertemplate{footline}[frame number]
+
+\hypersetup{pdfpagemode=UseNone} % don't show bookmarks on initial view
+
+
+\title[Early contest STEP-UP: Investigating interferometry with GRAND and BEACON]{
+	{ \large Early contest STEP-UP: }\\
+	{
+		Investigating interferometry with\\
+		GRAND\footnote{Giant Radio Array for Neutrino Detection} and BEACON\footnote{Beam forming Elevated Array for COsmic Neutrinos}
+	}
+}
+
+\date{March $13^{\text{\tiny{th}}}$, 2023}
+
+\author{
+	E.T. de Boone
+	\\
+	\vspace{2em}
+	Advisor: Olivier Martineau, LPNHE\\
+	\quad\quad\quad\quad\quad Harm Schoorlemmer, IMAPP
+	}
+
+\begin{document}
+{
+\setbeamertemplate{footline}{} % no page number here
+\section{Talk}
+\frame{	\titlepage }
+}
+
+\begin{frame}{My studies}
+	Studies @Radboud University, Nijmegen
+	\begin{itemize}
+		\item Bachelor from 2012 to 2020 \\
+			\quad {\small Minor: Astrophysics}
+
+		\item Master from 2020 to 2023 (expected) \\
+			\quad {\small Specialisation: Particle and Astrophysics}\\
+			\quad {\small Minor: Computational Data Science}
+
+		\item Master's Internship (November 2021 - May 2023) \\
+			\quad {\small Supervisor: Harm Schoorlemmer, IMAPP, Radboud University}\\
+			\quad {\small ``Enhancing Timing Accuracy in Air Shower Radio Detectors''}
+	\end{itemize}
+
+	\vspace*{2em}
+
+	Interests:
+	\begin{itemize}
+		\item Hardware experimenting
+		\item Ultra High Energy particles
+		\item Radio detection
+	\end{itemize}
+\end{frame}
+
+% Context
+%%%%%%%%%
+\begin{frame}{Ultra High Energy particles}
+	\begin{figure}
+		\includegraphics[width=\textwidth]{grand/astroparticletypes_grand.jpg}
+%		\caption{
+%			From: \cite{GRAND:2018ia}
+%		}
+	\end{figure}
+\end{frame}
+
+\begin{frame}{Radio signals and Airshowers}
+	\begin{figure}
+		\includegraphics[width=\textwidth]{grand/GRAND-detection-principle-1.png}
+%		\caption{
+%			From: \cite{GRAND:2018ia}
+%		}
+	\end{figure}
+\end{frame}
+
+\begin{frame}{Advantages of Radio Interferometry}
+	\begin{columns}
+		\begin{column}{0.5\textwidth}
+			\begin{itemize}
+				\item<1-> Shower axis reconstruction%\; Relevant for $\nu$s pointing back to sources
+					\vspace*{2em}
+				\item<2-> Depth of airshower\\
+					$\mapsto$ composition measurement (Fe, p, $\gamma$, $\nu$)
+			\end{itemize}
+		\end{column}
+		\begin{column}{0.5\textwidth}
+			\begin{figure}
+				\includegraphics<1,2>[width=\textwidth]{2006.10348/fig01.png}
+				\includegraphics<3>[width=\textwidth]{2006.10348/fig03_b.png}
+				%\includegraphics<2>[width=\textwidth]{1607.08781/fig02b_longitudinal_shower_profile.png}
+%				\caption{
+%					From: \cite{Schoorlemmer:2020low}
+%				}
+			\end{figure}
+		\end{column}
+	\end{columns}
+\end{frame}
+
+
+% Radio Interferometry
+%%%%%%%%%%%%%%%%%%%%%%
+\section{Radio Interferometry Concept}
+\begin{frame}{Radio Interferometry: Concept}
+	\begin{columns}
+		\begin{column}{0.4\textwidth}
+			\begin{figure}
+		   		\includegraphics[width=\textwidth]{radio_interferometry/Schematic_RIT_extracted.png}
+			\end{figure}
+		\end{column}
+		\begin{column}{0.6\textwidth}
+			\vspace*{\fill}
+			\begin{itemize}
+				\item<1-> Measure signal $S_i(t)$ at antenna $\vec{a_i}$
+
+				\item<2-> Calculate light travel time \\[5pt]
+					$\Delta_i(\vec{x}) = \frac{ \left| \vec{x} - \vec{a_i} \right| }{c} n_{eff}$
+
+				\item<2-> Sum waveforms accounting \\
+					for time delay \\[5pt]
+					$S(\vec{x}, t) = \sum S_i( t + \Delta_i(\vec{x}) )$
+			\end{itemize}
+
+			\vspace*{\fill}
+
+			\begin{figure}% Spatially
+				\includegraphics<1>[width=0.8\textwidth]{radio_interferometry/single_trace.png}%
+				\includegraphics<2>[width=0.8\textwidth]{radio_interferometry/trace_overlap_bad.png}%
+				\includegraphics<3>[width=0.8\textwidth]{radio_interferometry/trace_overlap_medium.png}%
+				\includegraphics<4>[width=0.8\textwidth]{radio_interferometry/trace_overlap_best.png}%
+			\end{figure}
+		\end{column}
+	\end{columns}
+\end{frame}
+
+% My Internship
+%%%%%%%%%%%%%%%
+\begin{frame}{Timing Constraint for Radio Interferometry}
+	\vspace*{ -2em }
+	Required time accuracy $< 1 \mathrm{ns}$ not provided by GNSS $ \gtrsim 5 \mathrm{ns}$.
+	\vspace{ 2em }
+	\begin{columns}
+		\begin{column}{0.5\textwidth}
+			\visible<2->{Additional synchronisation\\
+				using physics band
+				}
+			\begin{itemize}
+				\item<2-> Pulsed beacon
+				\item<2-> Long period ($\sim 1 \mathrm{\mu s}$)% (AERA)
+				\item<3-> Short period ($\lesssim 20 \mathrm{ns}$)
+			\end{itemize}
+		\end{column}
+		\begin{column}{0.5\textwidth}
+			\begin{figure}% Clock error fixes
+				\includegraphics<1>[width=\textwidth]{radio_interferometry/trace_overlap/dc_grid_power_time_fixes.py.scale4d.best.trace_overlap.zoomed.repair_none.png}%
+				\includegraphics<2>[width=\textwidth]{radio_interferometry/trace_overlap/dc_grid_power_time_fixes.py.scale4d.best.trace_overlap.zoomed.no_offset.png}%
+				\includegraphics<3>[width=\textwidth]{radio_interferometry/trace_overlap/dc_grid_power_time_fixes.py.scale4d.best.trace_overlap.zoomed.repair_phases.png}%
+				\includegraphics<4>[width=\textwidth]{radio_interferometry/trace_overlap/dc_grid_power_time_fixes.py.scale4d.best.trace_overlap.zoomed.repair_all.png}%
+			\end{figure}
+		\end{column}
+	\end{columns}
+\end{frame}
+
+\begin{frame}{My Internship: Enhancing Timing Accuracy in Air Shower Radio Detectors}
+	\vspace{1em}
+	In-band mechanisms affect physics data \\
+	How often should we `resynchronise'? \\
+
+	\begin{itemize}
+		\item GNSS clock stability
+		\item dead-time
+		\item disruptiveness
+	\end{itemize}
+	\vspace{1em}
+
+	\vfill
+	\begin{columns}
+		\begin{column}{0.6\textwidth}
+			\includegraphics<1>[width=\textwidth]{grand/split-cable/split-cable-delays-ch1ch4.pdf}
+			\includegraphics<2>[width=\textwidth]{grand/split-cable/split-cable-delay-ch1ch2-50mhz-200mVpp.pdf}
+		\end{column}
+		\begin{column}{0.4\textwidth}
+			\includegraphics[width=\textwidth]{beacon/time_res_vs_snr.pdf}
+		\end{column}
+	\end{columns}
+\end{frame}
+
+% Towards GRAND
+%%%%%%%%%%%%%%%%%%%%
+
+\begin{frame}{GRAND and Interferometry}
+	\begin{columns}
+		\begin{column}{0.6\textwidth}
+			GRAND in heavy development\\
+			relying on radio measurements
+
+			\vspace{2em}
+			Special interest in horizontal showers\\
+
+			\vspace{2em}
+
+			Neutrino's point back to source\\
+
+			\visible<2->{
+				\vspace*{\fill}
+				\begin{center}
+				\begin{minipage}{.6\textwidth}
+					\hrule
+					\centering
+					\vspace{ 2em }
+					\textit{Thank you!}
+				\end{minipage}
+				\end{center}
+				%\vspace{ 4em }
+			}
+		\end{column}
+		\begin{column}{0.4\textwidth}
+			\begin{figure}
+				\includegraphics<1>[width=\textwidth]{2006.10348/fig03_b.png}
+				\includegraphics<2>[width=\textwidth]{2006.10348/fig01_a.png}
+%				\caption{
+%					From: \cite{Schoorlemmer:2020low}
+%				}
+			\end{figure}
+		\end{column}
+	\end{columns}
+
+\end{frame}
+
+
+%%%%%%%%%%%%%%%
+% Backup slides
+%%%%%%%%%%%%%%%
+\appendix
+\section{Supplemental material}
+\begin{frame}[c]
+	\centering
+	\Large {
+		\textcolor{blue} {
+	Supplemental material
+	}
+	}
+\end{frame}
+
+\begin{frame}{Airshower development}
+	\begin{figure}
+		\includegraphics[width=\textwidth]{1607.08781/fig02a_airshower+detectors.png}
+%		\caption{
+%			From \cite{Schroder:2016hrw}
+%		}
+	\end{figure}
+\end{frame}
+
+\subsection{Radio Emission}
+\begin{frame}{Polarised Radio Emission}
+	\begin{columns}
+		\begin{column}{0.2\textwidth}
+			\centering
+			Geosynchrotron
+		\end{column}
+		\begin{column}{0.7\textwidth}
+			\includegraphics[width=\textwidth]{airshower/airshower_radio_polarisation_geomagnetic.png}%
+		\end{column}
+	\end{columns}
+	\vfill
+	\begin{columns}
+		\begin{column}{0.2\textwidth}
+			\centering
+			Askaryan
+		\end{column}
+		\begin{column}{0.7\textwidth}
+			\includegraphics[width=\textwidth]{airshower/airshower_radio_polarisation_askaryan.png}%
+		\end{column}
+	\end{columns}
+%	\vfill
+%	From: \cite{Huege:2017bqv}
+\end{frame}
+
+
+%%%%%%%%%
+\subsection{Single frequency beacon synchronisation}
+\begin{frame}{Short period beacon synchronisation}
+	\begin{figure}
+		\includegraphics<1>[width=\textwidth]{beacon/08_beacon_sync_timing_outline.pdf}%
+		\includegraphics<2>[width=\textwidth]{beacon/08_beacon_sync_synchronised_outline.pdf}%
+		\includegraphics<3>[width=\textwidth]{beacon/08_beacon_sync_synchronised_period_alignment.pdf}%
+	\end{figure}
+\end{frame}
+
+
+\begin{frame}{Time resolving short period beacon}
+	\begin{figure}
+		\includegraphics<1>[width=\textwidth]{radio_interferometry/dc_grid_power_time_fixes.py.X400.repair_none.scale4d.pdf}
+		\includegraphics<2>[width=\textwidth]{radio_interferometry/dc_grid_power_time_fixes.py.X400.repair_phases.scale4d.pdf}
+		\includegraphics<3>[width=\textwidth]{radio_interferometry/dc_grid_power_time_fixes.py.X400.repair_all.scale4d.pdf}
+		\includegraphics<4>[width=\textwidth]{radio_interferometry/dc_grid_power_time_fixes.py.X400.no_offset.scale4d.pdf}
+	\end{figure}
+\end{frame}
+
+%%%%%%%%%%
+\subsection{GNSS clock stability}
+\begin{frame}{GNSS clock stability I}
+	\begin{columns}
+		\begin{column}{0.4\textwidth}
+			\begin{figure}
+				\centering
+				\includegraphics[width=0.8\textwidth]{grand/setup/antenna-to-adc.pdf}
+				\caption{
+					GRAND Digitizer Unit's ADC to antennae
+				}
+			\end{figure}
+		\end{column}
+		\hfill
+		\begin{column}{0.5\textwidth}
+			\begin{figure}
+				\includegraphics[width=\textwidth]{grand/setup/channel-delay-setup.pdf}%
+				\caption{
+					Channel filterchain delay experiment 
+				}
+			\end{figure}
+		\end{column}
+	\end{columns}
+\end{frame}
+
+\begin{frame}{GNSS clock stability II}
+	\begin{figure}
+		\centering
+		\includegraphics[width=0.7\textwidth]{grand/setup/grand-gps-setup.pdf}
+		\caption{
+			GNSS stability experiment
+		}
+	\end{figure}
+\end{frame}
+
+\subsubsection{In the field}
+\begin{frame}{GNSS clock stability II}
+	\begin{columns}
+		\begin{column}{0.5\textwidth}
+			\includegraphics[width=\textwidth]{images/IMG_20220819_154801.jpg}
+		\end{column}
+		\begin{column}{0.5\textwidth}
+			\includegraphics[width=\textwidth]{images/IMG_20220815_161244.jpg}
+		\end{column}
+	\end{columns}
+\end{frame}
+
+%%%%%%%%%%%%%%
+% Bibliography
+%%%%%%%%%%%%%%
+\section*{References}
+\begin{frame}{References}
+	\printbibliography
+\end{frame}
+\end{document}
+

presentations/2023-03-13_step_up_interview/Makefile

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+# vim:ft=make
+-include config.mk
+
+.PHONY: all clean dist-clean
+
+### Variables
+MAIN_SRC  ?= main.tex
+TEXENGINE ?= latexmk --pdf
+
+MAIN_TARGET = $(patsubst %.tex,%.pdf,$(MAIN_SRC))
+
+### Targets
+all: $(MAIN_TARGET)
+
+dist: all clean
+
+$(MAIN_TARGET): $(MAIN_SRC)
+	$(TEXENGINE) $^
+
+dist-clean: clean
+	@rm -vf *.pdf *.eps *.dvi *.ps
+
+clean:
+	@rm -vf *.dat *.log *.out *.aux *.nav *.snm *.toc *.vrb *~ *.fls *.fdb_latexmk *-blx.bib *.bbl *.blg *.run.xml

presentations/2023-03-13_step_up_interview/README.md

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+# Interview for grant to do PhD in Paris
+
+length: 10minutes + 10minutes questions
+
+
+```
+I hear from colleagues that there is a strong pressure (3 candidates for PhDs at LPNHE, and at most one candidate will be selected, if he is very good), but the fact that you passed the first stage means that they consider your academic records acceptable.
+In principle for the oral examination the research part is the most important and you may then make a (positive) difference.
+
+Hence it is critical that this is very well prepared.
+The key here is to be very pedagogical, show that you understand the physics background of the work project, and how your work (past and future) fits in this. I think it would be great if we can prepare that together with Harm+me+you to increase your chances.
+My suggestion is that you prepare a few slides (less than 10 given the amount of time), send them to us and we comment them. Once we reach a good version then we do at least one (ideally 2) rehearsals.
+We can surely feed you with input for the slides (more details on the best practices for these kind of short presentations or details on the proposed PhD subject) to start with.
+```
+
+## Outline
+ 1. Airshowers / Ultra high energy / Radio Signal
+
+ 2. Radio Interferometry principle
+
+ 3. RI requires good timing -> work in internship
+	mention, but put most in [backup slides]
+
+ 4. Direct Advantages of RI
+	(follow airshower through the air)
+
+ 5. RI, CRs and Neutrinos
+	(better direction reconstruction is interesting for Ns not for CR)

presentations/2023-03-13_step_up_interview/config.mk

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+MAIN_SRC=2023-STEP_UP.tex